Yestertoys was a store that sold toys that had nostalgic value.
The store was operated by Ted Dymer, who dubbed himself "The Mad Bomber" after an episode of The Gray Ghost television series. During regular hours, Dymer bought authentic Gray Ghost merchandise from Simon Trent, even though demand for it was very low. Dymer also sent toy cars packed with explosives across Gotham and monitored their movements from the store. When Batman and Trent deduced him as the culprit, they tracked him to the store, and a fight ensued, resulting in Yestertoys going up in flames as Dymer was arrested.